Scraper



Aug.25,f1936 C. LE 'BLEU 2,652,182

SCRAPER Filed Deo. 18. 1933 4 sheets-sheet 2 Invenlar c. LBLEU Aug. 25, 1936.Y

SGRAPER Filed Dec. 18, -19'35 4 shets-sheet 4 ENTOR,

INV @244 ATTORNEY.

Patented Aug.A 25, 1936 v SCRMER Charles Le Bleu,

llos. llngeles, ilalii., assigner to The'slusser li/lcltcan Scraper Company, Sidney, Ohio. a corporation oil @hic Application December it, i933, Serial No. 702,892

3 Cial. im. l--li Figure 2 is a section on line 3 2 of Figure Si,4

'This invention relates generally to Scrapers which are used for removing or displacing dirt, sand and other material, as in the leveling of ground, building roads, excavating, grading, etc., and more particularly to the type known as carry all Scrapers in which the removed material may be transported from place to place.

Of the manifold objects of this invention, the prime one is to provide a scraper in which the removed material may be transported from place to place withoutspilling )or losing any part of the load, as is now often the case, especially when transporting loose sand over long distances.

Another object is the provision of a scraper in which the material handlingmeans and its actuating apparatus is carried by a primary frame structure supported at the forward end on a wheeled carriage and pivctally connected, at the rear end to a secondary frame which is tiltablysupported on a wheeled axle and carries a hydraulic power unit associated with the primary l frame for effectively raising and lowering same.

A further object is the provision of a scraper A in which a tiltable bowl or scoop has associated therewith a gate adapted to automatically swing toward the receiving side of the bowl upon elevating same from the operating position for ,retaining the removed material within the bowl, and swing away from the bowl upon tilting same .for discharging the load. 'The gate is also automatically retained 4in the swung away position after,

the bowl is brought back to its operating position. Another object is the provision of a scraper in. which the bowl and the gate are operated by individual hydraulic power units, both of which are controlled by a single valve within the operators reach. v ff., I

As a further object, it proyides a simple and compact yet substantial powr controlled implement by which a surface operated upon may be scraped, graded, leveled and lled in to a desired degree, the removed material effectively retained within the implement for transportation and that the degree of operation together with the operative and inoperative positions of the implement may be .controlled eiliciently with a minimum of power by a single operator from a remote station.

Withthese and other objects in view the invention consists in the combination, correlation and construction of parts. members and features which will Vbedescribed in the specification and will be finally pointed out in the claims.

Referring to the drawings:

'Figure 1 is a plan view of a device embodying my invention.

illustrating the implement in the scraping position.

Figure 3 is a section similar to Figure 2, illustrating the load carrying position of the implement. A

Figure 4 is a section similar to Figure 3, showitng the implement in the load discharging posiion.

Figure 5 is a section similar to Figure di, illustrating the position of the bowl and gate before lowering into scraping position.

Figure 6 is a rear elevation of Figure 4.

Figure 7 is a perspective view of the gate.

Figure 8 is a plan view of a modified form of 15 the device. i

Figure 9 is a section on line 9 9 of Figure li, illustrating the implement in the scraping position.'

Figure 10 is a side elevation of Figure 8, illustrating the load carrying and discharging .positions of the implement. Figure ll is a diagrammatic view of the valve system for controlling the flow of fluid to the hydraulic power unit, with the valve plugs in their idle positions. a cross sectional view taken through the valve controlling ythe ow of fluid to the bowl tilting cylinder and the gate raising and lowering cylinder, with the valve plug in a position to force the fluid into the rear ends of those cylinders to discharge the load. And Figure 13 is a cross-sectional view taken through the same valve, with the valve plug in a reverse position.

The objects outlined above are attained by the Figure l2 is 25 preferred and modied forms of embodiment of 35 the invention shown in the drawings, which in a generic sense consists of material handling means and its actuating apparatus carried by a primary frame structure adapted for connection to a .vehicle and supported at the forward end on a wheeled carriage. a secondary frame tiltably supported on a wheeled axle and pivotally connected to the rear end of the primary frame, actuating means mounted on the secondary frame and associated with the 'primary frame for controlling the vertical relation ofthe implement to the ground surface. Referring to Figures 1 to 7 inclusive: l

In a more specic sense, the inventionexemplified by the preferred form in the accompanying drawings in a practical form of embodiment, is shown as comprising a primary framel consisting of a rectangular portion 2 including the forward and rearward cross members 3 and 4 which are rigidly conjoined by side members 5, and

a forwardly extending bifurcated tongue 6 consisting of the spaced apart longitudinal members 1, which are secured at the rear ends to the forward cross member 3 and junctioned at the forward ends to form the depending leg 8 which in turn is swivably connected, as at 9, to the wheeled carriage I6. The wheeled carriage I is provided with a draft tongue III adapted for connection to a tractor as shown at I2. f

A- U-shaped secondary frame I3 comprising a cross member I4 having the forwardly extending side members I5 which are pivo'tally connected to the rear cross member 4 of primary frame I, as shown at I6. To the under side of side members I5 and intermediate their ends are secured bearings I1 in which axle I8 carrying the wheels I9, is journaled.

A hydraulic power unit is pivotally mounted, as at 2|, on the cross member I4 of the secondary frame I3 and has its piston rod 22 pivotally connected to brackets 23, as shown at 24, which are welded or otherwise secured to the rear cross member 4 of the primary frame I.

Fluid under pressure is supplied through hose lines and 26 to the hydraulic power unit 2U from a pump 25a on the vehicle and is controlled by a plug valve 26a within the reach of the operator. The vehicle, being conventional, is not illustrated.

The secondary frame I3 is tiltable by virtue of the bearings I1 on axle I8 and by reason of its pivotal connection to the rear end of the primary frame I imparts a raising and lowering motion to the primary frame I thereby controlling the degree of operation of the implement. The hydraulic power unit 28 by reason of its connections 2| and24 to the secondary and primary frames I3 and I respectively, provides the motive power for tilting the secondary frare I3 by spreading and contracting the distance between -the connections 2| and 24.

A bowl or scoop 21, provided with the usual cutting edge 26 and side wings 29, is pivotally supported within the rectangular portion 2 of the primary frame I by means of trunnions 30 on side wings 29 and pivoted in bearings 3I on the side members 5. A hydraulic power unit 32 pivotally mounted in brackets 33, as shown at 34, has its piston rod 35 connected to the bowl 21 as shown at 36. The brackets 33 are secured to the longitudinal r'nembers 1 of the bifurcated tongue 6.

A gate 31 comprising a scoop 38 having a cutting edge 39 and at each end thereof the side wings 40. The upper edge of the scoop 38 is reinforced longitudinally by means of the angles 4I and 42, and transversely by web 43. The side wings 40 are provided with upwardly extending lobes 44, which are adapted to be'pivotally connected to brackets on the side members 5. A hydraulic power unit 46, positioned within the space 41 between the longitudinal members 1 of the bifurcated tongue 6 and pivdtally mounted in brackets 48, as shown at 49, on the junction forming the leg 8, has `ifs'piston rod 50 pivotally connected to the top edge of scoop 38 as illustrated at 5 I.

Fluid under pressure is supplied to the hydraulic power units 32 and 46 through hose lines 52 and 53, f rom a pump 52a.

The hose lines 52 and 53 lead to the forward and'rearward ends, respectively, of the. hydraulic power unit 32. Branch conduits 54 and 55 by virtue of the Y connections 56 and 51 interposed in hose conduits 52 and 53, respectively, supply fluid under pressure tothe forward and rearward ends of the hydraulic power unit 46. The supply of fiuid to both of the hydraulic power units 32 and 46 is controlled by a single conventional plug valve 53a within the reach of the operator.

It'will be noted that the trunnions 30 are se cured to side wings 29 forward of the center of gravity of bowl 21 so that the weight of the bowl at,the rear side of trunnions 38 is greater than the weight of the gate 31. The reason for this distribution of weights will be pointed out subsequently.

When the bowl 21 is in the `scraping position, as illustrated in Figure 2, the gate 31 is swung away from the receiving side of the bowl and is retained in that position during the scraping operation. When the bowl 21 is lled with the removed material and it is desired to transport this material to another place, the valve 53a governing the supply of fluid to hydraulic power units 32 and 46 is manipulated to the position shown in Figure 13 to force the fluid through conduit line 52 and its branch 54 simultaneously to the forward ends of cylinders 32 and 46, respectively. Inasmuch as the piston of hydraulic power unit 32 is at the end of its rearward stroke when the implement is in this position, the hydraulic power unit 46 will now operate to Aclose gate 31 against to bowl 21A for retaining the accumulated material, Now the valve 26L actuating the hydraulic power unit 20 is manipulated to raise the bowl 21 ofi the ground surface for transportation, as illustrated in Figure 3.

For discharging the load, the valve 53a governing the supply of fluid to hydraulic power units 32 and 46 is manipulated to the position shown in Figure 12 to force the fiuid through conduit line 53 and its branch 55 simultaneously to the rearward ends of cylinders 32 and 46, respectively. Here, by virtue of the differential in resistance due to the above mentioned weight variations, the hydraulic power unit 46 acts first, thereby op'ening gate 31. When gate 31 is fully opened the piston within the cylinder 46 has reached the end of its stroke and then the full pressure from conduit line 53 is directed against the piston within cylinder 32 to tilt bowl 21 for discharging, as illustrated in Figure 4.

To return the bowl 21 to its original position` the valve 53a. governing the supply of fluid to the hydraulic power units 32 and 46 is again manipulated to force the uid through conduit line 52 and its branch 54 simultaneously to the forward ends of cylinders 32 and 46, respectively. Now by reason of the fact that the bowl 21 is heavier at its rear side than the gate 31, it has a greater tendency to swing back into its original position by gravity than has the gate 31 thus causing the hydraulic power unit 32 to act first. When the piston within the cylinder 32 is near the end of its stroke the fiuid supply is shut off, thus preventing the actuation of power unit 46 and retaining gate 31 in the open position as shown in Figure 5 where the implement is illustrated in the position just prior to lowering into the scraping position.

It has been pointed out above that the tilting of the bowl 21 and operation of gate 31 can be controlled by a single valve, in this inst: nce the valve 53a, by reason of weight differentials between the back of bowl 21 and the gate 31. -The same function, however, may be obtained when the weights of bowl 21 and gate 31 are balanced. by having the cylinder 46 ofa larger diameter than the cylinder 32.

Referring to Figures 8 toy l0 inclusive: v The invention exemplliied by the modiiied lorm in these iigures in a practical embodiment is shown as comprising a primary frame la consisting of a rectangular portion 2a including the lorward and rearward cross members tu. 'and du which are rigidly conjoined by side members da, and a forwardly extending tongue 6d o which the depending leg 8a is swivably connected as at ila, to the wheeled carriage ltd. The wheeled carriage ita is provided with a draft tongue llo adapted for connection to a tractor as shown at lla.

A U-shaped secondary frameltai comprising a cross member ita having the forwardly extending side members loci which are pivotally connected to the rear cross member la of primary frame la, as shown at ida.. To the under side of side members Ilia and intermediate their ends are secured bearings lla in which axle ita carrying the wheels ida, is journaled.

A hydraulic power unit 2da is pivotally mount-s ed, as at 2 la, on the cross member Naci? the secondary frame itav and has itspiston rod 22a pivotally connected to brackets 23a, as' shown at 2da, which are welded or otherwise secured td the rear cross member to of the primary frame la.`

Fluid under pressure is supplied through .hose lines 25a and 26a to the hydraulic power unit 20a from a pump similar to the pump 25a on the vehicle and is controlled by a valve similar to the v alve 26a within the reach of the operator. The vehicle, being conventional, is not illustrated.

The secondary framei3d is tiltable by virtue oi the bearings lla on axle l8a and by reason of its pivotal' connection to the rear end of the primary frame la imparts a raising and loweringmotion to the primary frame la thereby controlling they degree of operation of the implement. The hydraulic power unit 2da by reason of its connections 2Ia and 24a to the secondary and primary frames i3d and la respectively, provides the motive power for tilting the secondary frame Ia by spreading and contracting the distance between the connections 2 la and 24a.

A bowl or scoop 58, provided with an arcuate tudinally along its lower and upper edges by4 angles 65 and 66, and transversely by web 61.

The arcuate back 59 may be provided with av brackets 'mare secured to the forwardly extending tongue Ga'. 1

Having thus described my invention I claim:

1.' In'an implement of the type described, in'

combination with a wheeled frame adapted to be raised and lowered, a scraper bowlv pivotally mounted on said frame, a gate pivotally hung on said frame, the weight ci the bowlA at the rear -side of its pivotbcing greater than the weight-of the gate, means for raising the bowl od the inde'r and pivotally connected at' its outer end to the upper frontend of said gate, conduit means for conducting duid under pressure to the rear ends ot said cylinder, and a valve .permitting the huid to dow through said conduit meansl simultaneously to the rear ends of both cylinders, iirst to move the piston inwardly in the second cylinder to raise the gate by virtue of the differential in resistance due to said weight variation, 'and when said second piston has reached theend of its stroke the piston in the nrst cylinder'will be actuated by said :fluid to tilt the bowl to discharge the material therefrom.

2. A' leveling device comprising a primary frame structure adapted for connection to a tractor, a scoop mounted'iwithln said primary frame, a secondary frame, a wheeled axle mounted intermediate the ends of said secondary frame, pivotal means for connecting the forward Y end oi' said secondary frame to the rear end of, said primary frame, hydraulic power means interposed between the rear ends of said primary and secondary frames for imparting rocking.

movement to said secondary frame thereby raising and lowering said primary frame.

. 3. In an implement of the type described, in combination with a wheeledframe adapted to be raised and lowered,- a scraper bowl pivotally mounted on said frame, a gate pivotally hung on said frame, the weight of the bowl at the rear side of its pivot being greater than the Weight of the gate, means Afor raising the bowl oi the ground for transportation after the gate is closed against the bowl to retain the accumulated materlal therein, a hydraulic cylinder pivqtally mounted on said frame, a piston reciprocable in said cylinder and pivotally connectedV at its outer end to the rear end of said bowl, a second hydraulic cylinder also pivotally mounted in said frame, apist'on reciprocable in the latter cylinder and pivotally connected at its outer end to the upper front end of said gate, a conduit line having two branches, one branch leading to the front end of the rst cylinder and the ,other branch to the front end of the second cylinder,. a second conduit line having two branches, one branch leading to the rear end of the iirst cylinder and the other branch leading to the vrear vend of the second cylinder, and e. valve for controlling the ow of iiuid under pressure through either conduit line, -to convey duid simultaneously to'the front ends of said cylinders, or simultaneously to the rear ends of the latter.

' CHARLES LE 

